Curtain-fixture



. UNITED STATES THOMAS J. PARKINSQN, OF PITTSBURG, PENNSYLVANIA.

CURTAIN- FIXTURE.

SPECIFICATION forming part of Letters Patent No. 296,048, dated April 1, 1884.

' Application filed December 29, 1883. (No model.)

1'0 @U who/r1, t may concern:

Beit known that I, THOMAS J. PAEKINsoN, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have inventedcertain new and useful Improvements in Curtain-Fixtures; and I do hereby declare that the following is a full, clear, and exact description of the y invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification, in which-n l Figure 1 is a front elevation of my improved iixture, the curtain-cord being indicated by dotted lines. Fig. 2 is a side view of same.

This invention relates to the construction of y that class of devices in curtainfiixtures intended to be used for adjusting the tension of the operatingcord; and it consists in the novel construction and combination of parts, substantially as hereinafter fully described and claimed.

In the drawings, A designates a plate having two holes in it for the screws b and c, whereby it is secured to the window-frame and there held in a rigid position. Along one edge of plate A is a raised rim,d, serrated with ratchet-teeth, as shown. Rim d is, by preference,

an arc of a circle, but'niay, when desired, be

straight. The screw c is rst inserted iir place and driven. Screwb is then applied, after being inserted through the eye e of the lever B. Screw c holds plate A tightly against the woodwork of the window, and screw b prevents it from rotation and acts as pivot for lever B. The lever B is made in one piece, having the cord-knob i and the knife-edge k undercut, as

shown. Knife-edge. k engages automatically with the ratchet-rim cl. Lever Bis rigid, and is adapted to have slight play on its pivot b, so thatwhen the strain of the cord h is on it the tendency is to rock the knifeedge lc into deeper and more secure engagement with the ratchet d. rIhe cord h is slipped onto the grooved knob i, and tightened by simply drawing the lever B downwardly. The strain of l the cord always compels the edge k to engage the ratchet, and hence there is no tendency to slip. v Ihe lever B being rigid, thereis no tendm.ency to yield outwardly.

rIhe device may be also applied to awningropes, when constructed on a suitable scale.

Where the rim d is made straight instead of aro-shaped, obviously the teeth on the rim will be given radial form, their edges pointing toward a common center. In such case the knife edge of the lever would be somewhat longer,

THOMAS` J. PARKINSON.

lVitnesses:

T. J. PATTERsoN, F. A. PoLLocK. 

